/Engine/Plugins/FX/Niagara/Source/Niagara/Public/NiagaraCommon.h
bool RenameVariableIfMatching ( const [FNiagaraVariableBase](API\Plugins\Niagara\FNiagaraVariableBase) & OldVariable, const [FNiagaraVariableBase](API\Plugins\Niagara\FNiagaraVariableBase) & NewVariable, const [UNiagaraEmitter](API\Plugins\Niagara\UNiagaraEmitter) * InEmitter, [ENiagaraRendererSourceDataMode](API\Plugins\Niagara\ENiagaraRendererSourceDataMode) InSourceMode )